Amino acid sequences of mesothelin transcript variants 1, 2 and 3. Amino acids in single-letter code are displayed for maximal sequence alignment of translated mesothelin variant 1 (tr1, GenBank accession NM_005823), variant 2 (tr2, NM_013404) and variant 3 (tr3, AF180951). (.) indicates amino acid identity, and (-) represents gaps for optimal sequence alignment. Note that tr3 is a partial cDNA lacking N-terminal sequence.